Coffee Buttercream Layer Cake

Ingredients

• 1 cup (2 sticks) unsalted butter, softened
• 4 oz powdered sugar
• 4 egg yolks
• 2 egg whites
• strong brewed coffee, cooled
• sponge biscuits

Method

1. 1 Cream the butter and powdered sugar together until well mixed.
2. 2 Add the egg yolks one at a time, mixing thoroughly after each addition.
3. 3 Stir in the egg whites and add boiling coffee essence drop by drop to taste.
4. 4 Line a mold with sponge biscuits, then layer the cream mixture and biscuits alternately.
5. 5 Refrigerate overnight and serve the following day.